G
Gregory J. Downing
Researcher at National Institutes of Health
Publications - 13
Citations - 6590
Gregory J. Downing is an academic researcher from National Institutes of Health. The author has contributed to research in topics: Wortmannin & Phosphatidylinositol. The author has an hindex of 11, co-authored 13 publications receiving 5934 citations.
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Journal ArticleDOI
Biomarkers and surrogate endpoints: Preferred definitions and conceptual framework*
Arthur J. Atkinson,Wayne A. Colburn,Victor G. DeGruttola,David L. DeMets,Gregory J. Downing,Daniel F. Hoth,John A. Oates,Carl C. Peck,Robert T. Schooley,Bert A. Spilker,Janet Woodcock,Scott L. Zeger +11 more
TL;DR: Biomarker measurements provide an avenue for researchers to gain a mechanistic understanding of the differences in clinical response that may be influenced by uncontrolled variables (for example, drug metabolism).
Journal ArticleDOI
Considerations in the evaluation of surrogate endpoints in clinical trials. summary of a National Institutes of Health workshop.
Victor De Gruttola,Pamela Clax,David L. DeMets,Gregory J. Downing,Susan S. Ellenberg,Lawrence M. Friedman,Mitchell H. Gail,Ross L. Prentice,Janet Wittes,Scott L. Zeger +9 more
TL;DR: Recommendations from a National Institutes of Health Workshop on methods for evaluating the use of surrogate endpoints in clinical trials included a strong recommendation for increased training of quantitative scientists in biologic research as well as in statistical methods and modeling to ensure that there will be an adequate workforce to meet future research needs.
Journal ArticleDOI
Characterization of a soluble adrenal phosphatidylinositol 4-kinase reveals wortmannin sensitivity of type III phosphatidylinositol kinases.
TL;DR: Findings indicated that type III rather than type II PtdIns 4-kinases are responsible for the maintenance of the precursor phospholipids required for intracellular signaling through the inositol phosphate/Ca2+ pathway.
Journal ArticleDOI
Isolation and Molecular Cloning of Wortmannin-sensitive Bovine Type III Phosphatidylinositol 4-Kinases
TL;DR: The molecular cloning of these novel WT-sensitive type III PI 4-kinases will allow detailed analysis of their signaling and other regulatory functions in mammalian cells.
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Evaluation of airway complications in high-risk preterm infants: application of flexible fiberoptic airway endoscopy.
TL;DR: Flexible bronchoscopic evaluation of a high-risk population demonstrated a higher incidence of moderate or severe SGS or TM than previously suspected and correlated well with obstructive symptoms and may represent a means to quantitate clinically subglottic narrowing.